TTArtisans releases its 21mm F1.5 prime lens for Leica M-mount camera systems

Third-party Chinese lens manufacturer TTArtisan has released it's latest lens, a 21mm F1.5 prime for Leica M-mount camera systems. The fully-manual lens is constructed of 13 elements in 11 groups, has an aperture range of F1.5-F16 and features a 10-blade aperture diaphragm. The lens has minimum focusing distance of 70cm (27.6in) and a clicked aperture ring. We haven't tested any of TTArtisan lenses here at DPReview, but Vincent Bihler has a great review of the TTArtisan 35mm F1.4 on 35mmc and if...